Closes #6 and #8. Includes small test in main function.

printf.c

@@ -0,0 +1,102 @@
+#include <stdio.h> /* for testing only */
+#include <stdarg.h> /* va_list, va_start, va_arg, va_end macros */
+#include <stdlib.h> /* NULL macro */
+#include "holberton.h" /* _putchar */
+
+/**
+ * print_char - prints a char parameter from a va_list
+ * @ap: va_list from calling function
+ * Return: integer count of characters printed
+ */
+int print_char(va_list ap)
+{
+	return (_putchar(va_arg(ap, int)));
+}
+
+/**
+ * print_string - prints a string parameter from a va_list
+ * @ap: va_list from calling function
+ * Return: integer count of characters printed
+ */
+int print_string(va_list ap)
+{
+	char *str = va_arg(ap, char *);
+	int count = 0;
+
+	while (str[count] != '\0')
+		count += _putchar(str[count]);
+
+	return (count);
+}
+
+
+/**
+ * _printf - prints to stdout according to a format string
+ * @format: constant string containing zero or more directives
+ * Return: int number of characters printed (excluding terminating null-byte)
+ */
+int _printf(const char *format, ...)
+{
+	int i, j, count = 0;
+	va_list ap;
+	print_t funcs[] = {
+		{"c", print_char},
+		{"s", print_string},
+		{NULL, NULL}
+	};
+
+	va_start(ap, format);
+	for (i = 0; format != NULL && format[i] != '\0'; i++)
+	{
+		if (format[i] != '%')
+		{
+			count += _putchar(format[i]);
+			continue;
+		}
+		switch (format[++i])
+		{
+		case '%':
+			count += _putchar('%');
+			break;
+		case 'c':
+		case 's':
+			for (j = 0; funcs[j].spec != NULL; j++)
+			{
+				if (format[i] == funcs[j].spec[0])
+				{
+					count += funcs[j].fn(ap);
+					break;
+				}
+			}
+			break;
+		default:
+			exit(-1);
+		}
+	}
+	va_end(ap);
+	return (count);
+}
+
+/* TODO: REMOVE BEFORE PUSHING TO MASTER! */
+/**
+ * main - tests _printf against stdio::printf
+ * Return: 0 on SUCCESS
+ */
+int main(void)
+{
+	int a, b;
+
+	a = printf("a\n");
+	b = _printf("a\n");
+	printf("(%d, %d)\n", a, b);
+
+	a = printf("%c\n", 'A');
+	b = _printf("%c\n", 'A');
+	printf("(%d, %d)\n", a, b);
+
+	a = printf("%s\n", "Holberton");
+	b = _printf("%s\n", "Holberton");
+	printf("(%d, %d)\n", a, b);
+
+	return (0);
+}